Typewriting machine



Aprill2, 1932. w. GRAEPEL TYPEWRITING MACHINE Original Filed April 1, 1950 Patented Apr. 12, 1932 UNET STA WILLIAM GRAEPIEL, OF RIDGEWOOD, NEW YORK, ASSIGNOR TO ROYAL TYPEWRITER COMPANY, INC., OF NEW YORK, N. Y., A G ORPORATIGN OF NEW YORK TYPEWRITING MACHINE Original application filed April 1, 1930, Serial No. 440,849. Divided and. this application filed February 25,

This invention relates to new and useful improvements in typewriting machmes generally, although more particularly to means for positively retaining certa1n normally movable parts of the machine agalnst movement during shipment of the machine, and constitutes a division of my co-pendlng application Serial No. 440,8 9, filedhfhprfl 1, 1930, for improvements in typewriting machines.

Rough handling of typewriters, particularly when being shipped or when bemg carried, is very injurious to the movable parts of the machine, and therefore one of the objects of the invention is to provide releasable means for retaining the carriage against longitudinal or letter space movement.

With these and other objects in v1ew wh ch will more fully appear, the nature of the invention will be more clearly understood by following the description, the appended claims, the several views illustrated 1n the accompanying drawings, in which Figure 1 is a detail side elevation of a typewriting machine embodying my invention, and

Figure 2 is a detail perspective v ew showing my improved means for retaming the carriage against longitudinal or letter space movement.

Referring to the accompanying drawlngs, I have shown my invention as applied to the well known Royal portable typewriting machine, although it will be understood that the invention may be applied to typewriting machines of other manufacture. The typewriting machine as shown in the drawings embodies a main frame A having side plates 5 and a rear plate 6, and the usual shift frame which supports the carriage B through the medium of upper and lower rails 7, 7 and 8, 8 which are respectively fixed to the carriage B and to the shift frame. Disposed between each pair of upper and lower rails 7 and 8 is a plurality of anti-friction balls 7 and these balls are each mounted within a pinion 7 the teeth of which engage a series of openings 7 and "K" respectively formed in the upper and lower rails.

Serial No. 518,272.

Mounted on the main frame A is the usual center stop D.

In order to lock the carriage against endwise or longitudinal movement, I have provided a lock pin F which is preferably formed of a wire bent into U-shape to provide a connecting portion 9 and spaced legs 10 and 11, the former being shorter than the latter. This wire is of a diameter sufficiently small to permit the legs 10 and 11 to be inserted in registering pairs of openings 7 and 7 when the carriage is in its central position. This lock pin embraces the central stop D and consequently the pin is not only firmly held in operative position but is also prevented from turning. The shorter leg 10 is provided with a crimp 12 which forms a stop for cooperation with the central stop D to prevent accidental displacement of the stop pin. Attached to the lock pin F by a cord 13 is a tag 14 on which is suitable printed'matter, the cord and tag serving as a means to assist in withdrawing the look pin from its operative position.

I claim:

1. In a typewriting machine, the combination with a main frame, of a carriage mounted thereon, cooperating rails respectively provided with openings adapted to register when the carriage is in its central position, and a lock pin located in said registering openings to retain the carriage against longitudinal movement.

2. In a typewriting machine, the combination with a main frame, of a carriage mounted thereon, cooperating rails respectively fixed to the frame and to the carriage and respectively provided with openings adapted to register when the carriage is in its central position, a center stop for the carriage, and a U-shaped stop pin embracing the center stop and having its legs located in said registering openings to retain the carriage against longitudinal movement.

3 In a typewriting machine, the combination with a main frame, of a carriage mounted thereon, cooperating rails respectively fixed to the frame and to the carriage and respectively provided with openings adapted to register when the carriage is in its central position, a center stop for the carriage, and a U-shaped stop pin embracing the center stop and having its legs located in said registering openings to retain the carriage against longitudinal movement, one leg of the stop pin being provided with a stop arranged for cooperation with the center stop to retain said stop pin against accidental displacement.

In testimony whereof, I have hereunto subscribed my name.

WILLIAM GRAEPEL. 

